Oil preheating device



Jun 7, 1932- J. J. QUILL 1,861,877

OIL PREHEATING DEVICE 'Filed April l, 1950 lll lll:

In IH l'll Patented June 7, 1932 JEREMIAH J. QUILL, OF SAN FRANCISCO, CALIFORNIA OIL PREHEATING DEVICE Application led April 1,

'l`his invention relates to oil preheating devices, and more particularly to a device adapted for use in preheating oil prior to supplying it to the oil burners of furnaces,

boilers and similar nozzles.

An important object of the invention is to provide an automatic oil preheater of the character referred to which -is adapted to supply'oil to a burner preheated to a predeterl mined temperature to facilitate the combustionof the oil.

A further object is to provide a device of the character referred to which greatly improves combustion of the oil thus eliminating l5 smoke and stack carbonization, and consequently effecting a reduction in the rate of oil consumption.

A further object is to provide a preheater of the character referred to which is relative- ?3 ly simple and economical to manufacture and whichis fully automatic in operation and not subject to derangement in operation.

Other objects and advantages of the invention Will become apparent during the course 2510i the following description.

In the drawing I have shown one embodiment of the invention. In this showing,

Figure 1 is a horizontal sectional view on line 1-1 of Figure 2,

Figure 2 Ais a central vertical sectional view on line 2-2 of Figure 3,

Figure 3 is a plan view, and,

Figure 4 Ais a detail sectional view of the thermostatic control means.

Referring to Figures 1 and 2 the numeral designates a preferably cast body as a whole having preferably integral bosses 11 and 12 at opposite ends and near the bottom thereof. The end of a pipe 13 is threaded into the boss 11 and supplies fuel oil from a suitable source to a Asubstantially cylindrical heating compartment 14. An outlet pipe 15 is threaded into the boss 12 to feed oil to the burner from an outlet or strainer compartment 16.

The body 10 is provided with an intermediate thermostat chamber 17, as clearly shown in Figures 1 and 2. 1Walls 18 and 19 divide the thermostat chamber from the heating chamber 14 and the straining chamber 16,

1930. Serial No. 440,839.

as shown. An opening adjacent the top of the wall 18 affords communication between the chambers 14 and 17, while oil iows from the latter chamber to the chamber 16 through an opening 21 formed in the Wall 19 adjacent 55 the upper end thereof.

An inner casing 22 projects downwardly through the top 23 of the chamber 14, and is arranged substantially concentric with this chamber. A heating device 24 `is arranged 60 within the casing 22 and is provided with electrodes 25 supplied with current from a suitable source through Wires 26.

The chamber 17 is closed by a cap 27 in which is threaded the upper end of a tubular 65 member 28 which depends into the chamber 17 and is closed at its lower end by a cap 29. Any suitable form of thermostat, 30 is arranged within the tubular member 28 and is connected to wires 31 and 32. The wires 31 70 and 32 are connected in series with one of t-he wires 26 so that the thermostat governs the supply of current to the heating device.

The straining chamber 16 is provided with a transverse shelf or wall 33 to form an up- 75 per auxiliary chamber 34, closed at its upper end by a cap 34. A strainer 35 is arranged in the chamber 16 and is secured at its upper -end to a supporting ring or ferrule 36 which 1s provided with a horizontal flange resting 80 upon the wall 33.

The operation of the device is as follows:

The pipe 13 is connected to a source of oil supply as previously stated, and the oil flows from this pipe into the chamber 14 wherein 85 it surrounds the inner casing 22. The oil in the chamber will be heated upon energization of the electrodes 25 of the heating device 24, and from the chamber 14, the oil fiows through the opening 20 into the thermostat 90 chamber 17 where the temperature of the oil inuences the thermostat. When the temperature of the oil reaches a predetermined maximum, the circuit to the heating device through the wires 31 and 32 will be broken 95 to prevent further heating of the oil. When the temperature of the oil in the chamber 17 is reduced to a predetermined minimum, the thermostat will again operate to supply currentto the heating device. The desired min- 10C imum and maximum temperatures can be kept relatively close together so that the oil will be discharged from the chamber 17 at substantially constant temperatures.

From the thermostat chamber, the oil flows through the opening 21 into the chamber 34, and thence downwardly into the screen 35 which removes any solid foreign material from the oil. After being strained, the oil passes from the chamber 16 to the burner or other consuming device through the pipe 15, as will be apparent. i

The device does not interfere with the usual thermostatic control means associated with the burner. It will be obvious that when the burner is cut off from operation through its thermostatic control means, the oil in the preheating device ceases to flow and accordingly its temperature will promptly rise to the predetermined maximum at which point the circuit through the heating device will be broken and will remain broken until the temperature of the oil again drops to the predetermined minimum.

Accordingly it will be apparent that the device is fully automatic in operation and the supplying of oil preheated to the proper temperature, say from 95 to 110 F. to the burner, greatly improves combustion thus effecting efiiciency in operation and preventing smoke and stack carbonization.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim:

1. A device of the character described comprising a vertical heating chamber having an inlet opening in one side near the bottom thereof and adapted for connection with a source of oil supply, a casing projecting downwardly into said heating chamber through the top thereof, a heating element arranged in said casing, a thermostat chamber communicating at its upper end with the upper end of said heating chamber, a. top closing said thermostat chamber, said thermostat chamber being provided with outlet connections for supplying oil therefrom to a burner, and a thermostat carried by said top and projecting downwardly into said thermostat chamber to control said heating element to determine the temperature of the oil supplied to the burner.

2. A device of the character described comprising a vertical heating chamber having an inlet opening in one side near the bottom thereof and adapted for connection with a source of oil supply, a casing projecting downwardly into said heatin chamber through the top thereof, a heatlng element arranged in said casing, a thermostat chamber communcatin at its upper end with the upper end of sai heating chamber, a top closing said thermostat chamber, a thermostat carried by said top and depending into said thermostat chamber, said thermostat being connected to said heating element to determine the temperature of the oil in said heating chamber, an outlet chamber communicating with said thermostat chamber, said outlet chamber bein rovided with an outlet openin adapter? ihr connection with a burner, and a screen arranged in said outlet chamber.

3. A device .of the character described comprising an integral casin divided vertically to form a heating cham r, a thermostat chamber and an outlet chamber, said heating and outlet chambers being provided with inlet and outlet openings adapted for connection respectively with a source of oil sup 1y and a burner, a heating element arrangedp in said heating chamber, a screen arranged in said outlet chamber, and a thermostat arranged in said thermostat chamber to control said heatin element to determine the temperature of t e oil supplied to the burner.

4. A device of the character described comprising an integral casing divided vertically to form a heating chamber, a thermostat chamber and an outlet chamber communicating with each other ad'acent their upper ends, said heating and outlet chambers belng provided with inlet and outlet openings adapted for connection respectively with a source of oil supply and a burner, a heating element carried b the top of said heating chamber and projecting downwardly thereinto substantial] centrally thereof, a screen arranged in said7 outlet chamber, a top normally closing said thermostat chamber, and a thermostat connected'at its u per end to said top and projecting downwar ly into said thermostat chamber, said thermostat being connected to said heating element to control the latter to determine the temperature of the oil supplied to the burner.

In testimony whereof I aHix my signature.

JEREMIAH J. QUILL. 

